Spatial entity layers
The map is split into three types of place (entities). They never overlap, so every spot on the map belongs to exactly one type.
| Type | Source |
|---|---|
| Building | ZTOWN building outlines, used as they are |
| Street | MAPPLE street center lines, widened to the width of each street |
| Open space | Everything that is left after streets and buildings are removed from the street network area |
Two details matter later:
- Streets are stored as many short pieces next to each other. Because of this, a stay on a street has many street candidates around it, and this hurts the model: Candidate density bias toward building.
- Underground shopping arcades are not in ZTOWN. Stays recorded there had no matching building, so they were removed: Ground truth drop list.
Part of Ground truth data.